Abstract
This research evaluated the 2-year test-retest reliability of the Immediate Postconcussion Assessment and Cognitive Testing (ImPACT) neuropsychological battery, and clarified the need for biennial updated baseline testing of high school athletes. This study compared the baseline test scores of 212 non-concussed athletes that were obtained in Grade 9 and again 2 years later when they were in Grade 11. Regression-based methods indicated that 4 of the 5 ImPACT scores were stable over 2 years, as they fell within the 80% and 95% confidence intervals (CIs). The results suggested that updating baseline testing for high school athletes after 2 years is not necessary. Further research into the consistency of computerized neuropsychological tests over 2 years with high school athletes is recommended.
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